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3 years ago

Once again help? im just checking my answers again so yeah

Mathematics

1 answer:

amid [387]3 years ago

8 0

Answer:

Number of Weeks - { 1, $120} {4, $480} {8, $960}

Step-by-step explanation:

First divide $1,800 by 15, which gives you 120. for for every week you add on $120. $120 times 4 gives us $480. 960 divided by 120 gives you 8 weeks. (i hope this helps :) )

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In a class of 55 21 study physics 24 study geography and 23 study economics and physics. if x students study all three subjects

Rus_ich [418]

The total number of students who studied only two subjects is 13.

The given parameters:

Total number of students, n = 55
Number of physics students = 21
Number of geography students = 24
Number of economics students = 23
Number of students for the 3 subjects, = x
Number of students who studied non = 2x

The number of students who studied only two subjects can be determined by applying overlapping three sets formula as shown below;

$Total = n(phy) + n(geo) + n(econ) + n(none)- n(double) - 2(all \ subjects)\\\\55 = 21 + 24 + 23 + 2x-n(double) - 2(x)\\\\55 = 68- n(double)\\\\n(double) = 68-55\\\\n(double) = 13$

Thus, the total number of students who studied only two subjects is 13.

Learn more about overlapping three sets here: brainly.com/question/2041029

3 0

2 years ago

A survey was conducted by an independent price checking company to check an advertiser's claim that it had lower prices than its

Mama L [17]

Answer:

a) critical values ≈ -3.182 and 3.182 shows that there is difference in average prices

b) H0 : μd = 0

Ha : μd ≠ 0

Step-by-step explanation:

a) Determine if there is any significant difference in the average prices

using ∝ = 0.05

and μ( advertiser ) - μ ( competitor ) = μd

test statistic ( t ) = -3.011

df = 3

hence the critical values ( two tailed test ) = -3.182 and 3.182. this shows that there is sufficient evidence to show that there is difference in the average prices

b) state the hypothesis

H0 : μd = 0 ( null )

Alternate hypothesis : Ha : μd ≠ 0

5 0

3 years ago

X+7=5x2 what's the answer

Helen [10]

Answer: 3

Explanation:

x + 7 = 5 x 2

you do 5(2) and get 10

plug in 10 and the equation looks like:

x + 7 = 10

from there you would subtract 7 from 7 and 10 to isolate x and get your answer of:

x = 3 :)

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3 years ago

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Strike441 [17]

Answer:

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Is 3 1/4 a rational number

ICE Princess25 [194]

Answer: Yes the mixed 3 1/4 is a rational number.